No Upshift

1. Faulty shift valve.
2. Fault in No. 1 vehicle speed sensor circuit.
3. Fault in No. 2 vehicle speed sensor circuit.
4. Fault in shift solenoid valve No. 1, No. 2 circuit.
5. Fault in throttle position sensor circuit.
6. Fault in [1][2]park/neutral position switch circuit.
7. Faulty ECM.
8. Fault in O/D main switch and O/D OFF indicator circuit.
9. Fault in O/D cancel signal circuit.
10. Fault in engine coolant temperature sensor circuit.